.head_a{
  height: 44px;
  line-height: 44px;
  text-align: center;
  font-size: 18px;
  // color: hsl(10%, 10%, 80%);
  color: #3838389a;
  background-color: rgba(255, 255,255,0.8);  
}


.main{
  flex: 1;
  /* background: color image repeat position / size; */
  // background: url('../../assets/imgs/advertisement-bg.jpg') no-repeat center / cover;
  // object-fit:cover;
  /* background-size: cover; */
  position: relative;
  height: 100%;
  video{
    width: 100%;
    height: 100%;
    position: fixed;
    top: 0;
    z-index: -1;
    object-fit: cover;
  }
  .text{
      /* 大写 */
      text-transform: uppercase;
      color: #fff;
      font-size: 48px;
      font-weight: bold;
      width: 100%;
      text-align: center;
      position: absolute;
      bottom: 100px;
      /* opacity: 0; */

      /* animation: move 2s both; */
  }

  .jump{
      width: 105px;
      height: 40px;
      text-align: center;
      line-height: 40px;
      background-color: #fff;
      border-radius: 20px;
      position: absolute;
      right: 20px;
      top: 20px;
      opacity: 0.5;
      a{
          color: #000;
      }
  }
}


/* @keyframes move {
  0%{
      transform: translateY(-100px);
      font-size: 0px;
  }

  20%{
      transform: translateY(-120px);
      opacity: .2;
      font-size: 10px;
  }

  50%{
      transform: translateY(20px);
      opacity: .8;
      font-size: 36px;
  }

  100%{
      transform: translateY(0);
      opacity: 1;
      font-size: 48px;
  }
} */